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The LG Volt is pretty much an LG F90 branded for Boost Mobile and Virgin Mobile that sports a 4.7-inch qHD display, a 1.2GHz quad-core Snapdragon chipset, 1GB of RAM, 8GB of internal storage with a microSD card slot, an 8 megapixel camera on the rear and a 1.3 megapixel sensor on the front, a 3,000mAh battery and support for Sprint Spark LTE.

Below is the LG Volt LS740 usb driver if you do not have your PC to automatically update them for you. The drivers are necessary if you want to connect your phone to PC.

Tested to be working perfectly with my LG Volt LS740, now able to ADB into the device and no more exclamation marks in my device manage.